전통 온돌난방과 온수온돌을 융합한 자연에너지이용 바닥복사 냉방시스템

A Radiant Floor Cooling System for the Use of Natural Energy by Convergence of traditional Ondol and hot water Ondol heating system

The traditional Ondol heating system is heated by the used hot gas during cooking in kitchen. And hot water Ondol heating system is heated by the hot water heated by a boiler. But these two systems are not used in summer. This study develops a converged system of these two systems and analyzes an example of a radiant floor cooling system cooled by the circulation of a city water through a pipe embeded for a radiant floor heating of a room. Almost of all radiant floor heating or Ondol heating system in korea is used just in winter to heat the room. The temperature of city water is approximately 19∼23℃ which is variable to the outside temperature. We need to use the traditional radiant heating system to cool the room in summer too, to maximize a system efficiency. The thermal performance of the radiant floor cooling system is analyzed for summer period according to the DIN 4715-1. This study analyzes a thermal comfort characteristic, asymetric radiation and cooling load demand of a radiant floor cooling system cooled by the circulation of a city water through a pipe embeded for a radiant floor heating system of an existing room for summer period. An application of a radiant floor cooling system by the use of the city water could be very ecological.